packet-m3ua.c

   1 /* packet-m3ua.c
   2  * Routines for MTP3 User Adaptation Layer dissection
   3  * It is hopefully (needs testing) compilant to
   4  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-05.txt (expired)
   5  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-06.txt (expired)
   6  * http://www.ietf.org/rfc/rfc3332.txt
   7  *
   8  * Copyright 2000, 2001, 2002, 2003 Michael Tuexen <tuexen [AT] fh-muenster.de>
   9  *
  10  * $Id: packet-m3ua.c,v 1.31 2003/04/22 13:47:38 tuexen Exp $
  11  *
  12  * Ethereal - Network traffic analyzer
  13  * By Gerald Combs <gerald@ethereal.com>
  14  * Copyright 1998 Gerald Combs
  15  *
  16  * Copied from README.developer
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License
  20  * as published by the Free Software Foundation; either version 2
  21  * of the License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39
  40
  41 #include <string.h>
  42 #include <glib.h>
  43
  44 #include <epan/packet.h>
  45 #include "prefs.h"
  46 #include "sctpppids.h"
  47
  48 #define SCTP_PORT_M3UA         2905
  49 #define NETWORK_BYTE_ORDER     FALSE
  50 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
  51
  52 #define VERSION_LENGTH         1
  53 #define RESERVED_LENGTH        1
  54 #define MESSAGE_CLASS_LENGTH   1
  55 #define MESSAGE_TYPE_LENGTH    1
  56 #define MESSAGE_LENGTH_LENGTH  4
  57 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
  58                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
  59
  60 #define VERSION_OFFSET         0
  61 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
  62 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
  63 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
  64 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
  65
  66 #define PARAMETER_TAG_LENGTH    2
  67 #define PARAMETER_LENGTH_LENGTH 2
  68 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  69
  70 #define PARAMETER_TAG_OFFSET    0
  71 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  72 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  73 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  74
  75 #define PROTOCOL_VERSION_RELEASE_1             1
  76
  77 static const value_string protocol_version_values[] = {
  78   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
  79   { 0,                           NULL } };
  80
  81 #define MESSAGE_CLASS_MGMT_MESSAGE        0
  82 #define MESSAGE_CLASS_TFER_MESSAGE        1
  83 #define MESSAGE_CLASS_SSNM_MESSAGE        2
  84 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
  85 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
  86 #define MESSAGE_CLASS_RKM_MESSAGE         9
  87
  88 static const value_string message_class_values[] = {
  89   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  90   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
  91   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
  92   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
  93   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
  94   { MESSAGE_CLASS_RKM_MESSAGE,    "Routing key management messages" },
  95   { 0,                           NULL } };
  96
  97 static const value_string v5_message_class_values[] = {
  98   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  99   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
 100   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
 101   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 102   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 103   { 0,                           NULL } };
 104
 105 #define MESSAGE_TYPE_ERR                  0
 106 #define MESSAGE_TYPE_NTFY                 1
 107
 108 #define MESSAGE_TYPE_DATA                 1
 109
 110 #define MESSAGE_TYPE_DUNA                 1
 111 #define MESSAGE_TYPE_DAVA                 2
 112 #define MESSAGE_TYPE_DAUD                 3
 113 #define MESSAGE_TYPE_SCON                 4
 114 #define MESSAGE_TYPE_DUPU                 5
 115 #define MESSAGE_TYPE_DRST                 6
 116
 117 #define MESSAGE_TYPE_UP                   1
 118 #define MESSAGE_TYPE_DOWN                 2
 119 #define MESSAGE_TYPE_BEAT                 3
 120 #define MESSAGE_TYPE_UP_ACK               4
 121 #define MESSAGE_TYPE_DOWN_ACK             5
 122 #define MESSAGE_TYPE_BEAT_ACK             6
 123
 124 #define MESSAGE_TYPE_ACTIVE               1
 125 #define MESSAGE_TYPE_INACTIVE             2
 126 #define MESSAGE_TYPE_ACTIVE_ACK           3
 127 #define MESSAGE_TYPE_INACTIVE_ACK         4
 128
 129 #define MESSAGE_TYPE_REG_REQ              1
 130 #define MESSAGE_TYPE_REG_RSP              2
 131 #define MESSAGE_TYPE_DEREG_REQ            3
 132 #define MESSAGE_TYPE_DEREG_RSP            4
 133
 134 static const value_string v5_message_class_type_values[] = {
 135   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 136   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 137   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 138   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 139   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 140   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 141   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 142   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 143   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (UP)" },
 144   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (DOWN)" },
 145   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 146   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (UP ACK)" },
 147   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (DOWN ACK)" },
 148   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT ACK)" },
 149   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ACTIVE)" },
 150   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (INACTIVE)" },
 151   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ACTIVE ACK)" },
 152   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (INACTIVE ACK)" },
 153   { 0,                                                              NULL } };
 154
 155 static const value_string message_class_type_values[] = {
 156   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 157   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 158   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 159   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 160   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 161   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 162   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 163   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 164   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "Destination Restricted (DRST)" },
 165   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (ASPUP)" },
 166   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (ASPDN)" },
 167   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 168   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (ASPUP_ACK)" },
 169   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (ASPDN_ACK)" },
 170   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT_ACK)" },
 171   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ASPAC)" },
 172   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (ASPIA)" },
 173   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ASPAC_ACK)" },
 174   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (ASPIA_ACK)" },
 175   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "Registration request (REG_REQ)" },
 176   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "Registration response (REG_RSP)" },
 177   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "Deregistration request (DEREG_REQ)" },
 178   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "Deregistration response (DEREG_RSP)" },
 179   { 0,                           NULL } };
 180
 181 static const value_string v5_message_class_type_acro_values[] = {
 182   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 183   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 184   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 185   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 186   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 187   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 188   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 189   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 190   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP_UP" },
 191   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP_DOWN" },
 192   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 193   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP_UP_ACK" },
 194   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP_DOWN_ACK" },
 195   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 196   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP_ACTIVE" },
 197   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP_INACTIVE" },
 198   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP_ACTIVE_ACK" },
 199   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
 200   { 0,                                                              NULL } };
 201
 202 static const value_string message_class_type_acro_values[] = {
 203   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 204   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 205   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 206   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 207   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 208   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 209   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 210   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 211   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "DRST" },
 212   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASPUP" },
 213   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASPDN" },
 214   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 215   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASPUP_ACK" },
 216   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASPDN_ACK" },
 217   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 218   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASPAC" },
 219   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASPIA" },
 220   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASPAC_ACK" },
 221   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASPIA_ACK" },
 222   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "REG_REQ" },
 223   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "REG_RSP" },
 224   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "DEREG_REQ" },
 225   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "DEREG_RSP" },
 226   { 0,                           NULL } };
 227
 228 /* Initialize the protocol and registered fields */
 229 static int proto_m3ua = -1;
 230 static int hf_version = -1;
 231 static int hf_reserved = -1;
 232 static int hf_message_class = -1;
 233 static int hf_v5_message_class = -1;
 234 static int hf_message_type = -1;
 235 static int hf_message_length = -1;
 236 static int hf_v5_parameter_tag = -1;
 237 static int hf_v6_parameter_tag = -1;
 238 static int hf_parameter_tag = -1;
 239 static int hf_parameter_length = -1;
 240 static int hf_parameter_value = -1;
 241 static int hf_parameter_padding = -1;
 242 static int hf_parameter_trailer = -1;
 243 static int hf_network_appearance = -1;
 244 static int hf_info_string = -1;
 245 static int hf_routing_context = -1;
 246 static int hf_diagnostic_information = -1;
 247 static int hf_heartbeat_data = -1;
 248 static int hf_v5_error_code = -1;
 249 static int hf_v6_error_code = -1;
 250 static int hf_error_code = -1;
 251 static int hf_status_type = -1;
 252 static int hf_status_info = -1;
 253 static int hf_asp_identifier = -1;
 254 static int hf_affected_point_code_mask = -1;
 255 static int hf_affected_point_code_pc = -1;
 256 static int hf_cause = -1;
 257 static int hf_user = -1;
 258 static int hf_reason = -1;
 259 static int hf_v5_traffic_mode_type = -1;
 260 static int hf_v6_traffic_mode_type = -1;
 261 static int hf_traffic_mode_type = -1;
 262 static int hf_congestion_reserved = -1;
 263 static int hf_congestion_level = -1;
 264 static int hf_concerned_dest_reserved = -1;
 265 static int hf_concerned_dest_pc = -1;
 266 static int hf_local_rk_identifier = -1;
 267 static int hf_dpc_mask = -1;
 268 static int hf_dpc_pc = -1;
 269 static int hf_si = -1;
 270 static int hf_ssn = -1;
 271 static int hf_opc_list_mask = -1;
 272 static int hf_opc_list_pc = -1;
 273 static int hf_cic_range_mask = -1;
 274 static int hf_cic_range_pc = -1;
 275 static int hf_cic_range_upper = -1;
 276 static int hf_cic_range_lower = -1;
 277 static int hf_protocol_data_opc = -1;
 278 static int hf_protocol_data_dpc = -1;
 279 static int hf_protocol_data_si = -1;
 280 static int hf_protocol_data_ni = -1;
 281 static int hf_protocol_data_mp = -1;
 282 static int hf_protocol_data_sls = -1;
 283 static int hf_correlation_identifier = -1;
 284 static int hf_registration_status = -1;
 285 static int hf_deregistration_status = -1;
 286 static int hf_registration_result_identifier = -1;
 287 static int hf_registration_result_status = -1;
 288 static int hf_registration_result_context = -1;
 289 static int hf_v6_deregistration_result_status = -1;
 290 static int hf_v6_deregistration_result_context = -1;
 291 static int hf_li = -1;
 292
 293 /* Initialize the subtree pointers */
 294 static gint ett_m3ua = -1;
 295 static gint ett_parameter = -1;
 296
 297 static module_t *m3ua_module;
 298 static dissector_handle_t mtp3_handle, data_handle;
 299 static dissector_table_t si_dissector_table;
 300
 301 /* stuff for supporting multiple versions */
 302 typedef enum {
 303   M3UA_V5,
 304   M3UA_V6,
 305   M3UA_RFC
 306 } Version_Type;
 307
 308 static Version_Type version = M3UA_RFC;
 309
 310 static void
 311 dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
 312
 313 static void
 314 dissect_v5_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 315 {
 316   guint8  message_class, message_type;
 317
 318   /* Extract the common header */
 319   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 320   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 321
 322   if (check_col(pinfo->cinfo, COL_INFO))
 323     col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_class * 256 + message_type, v5_message_class_type_acro_values, "reserved"));
 324
 325   if (m3ua_tree) {
 326     /* add the components of the common header to the protocol tree */
 327     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 328     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 329     proto_tree_add_item(m3ua_tree, hf_v5_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 330     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 331                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, v5_message_class_type_values, "reserved"), message_type);
 332     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 333   }
 334 }
 335
 336 static void
 337 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 338 {
 339   guint8  message_class, message_type;
 340
 341   /* Extract the common header */
 342   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 343   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 344
 345   if (check_col(pinfo->cinfo, COL_INFO))
 346     col_add_fstr(pinfo->cinfo, COL_INFO,"%s ", val_to_str(message_class * 256 + message_type, message_class_type_acro_values, "reserved"));
 347
 348   if (m3ua_tree) {
 349     /* add the components of the common header to the protocol tree */
 350     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 351     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 352     proto_tree_add_item(m3ua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 353     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 354                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, message_class_type_values, "reserved"), message_type);
 355     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 356   }
 357 }
 358
 359 #define NETWORK_APPEARANCE_LENGTH 4
 360 #define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
 361
 362 static void
 363 dissect_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 364 {
 365   proto_tree_add_item(parameter_tree, hf_network_appearance, parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH, NETWORK_BYTE_ORDER);
 366   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET));
 367 }
 368
 369 #define V5_PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 370
 371 static void
 372 dissect_v5_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 373 {
 374   guint16 length, protocol_data_length;
 375   tvbuff_t *payload_tvb;
 376
 377   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 378   protocol_data_length = length - PARAMETER_HEADER_LENGTH;
 379   payload_tvb          = tvb_new_subset(parameter_tvb, V5_PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 380   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 381   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 382   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 383 }
 384
 385 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 386
 387 static void
 388 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 389 {
 390   guint16 info_string_length;
 391
 392   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 393   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, NETWORK_BYTE_ORDER);
 394   proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
 395                          (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 396 }
 397
 398 #define AFFECTED_MASK_LENGTH 1
 399 #define AFFECTED_DPC_LENGTH  3
 400 #define AFFECTED_DESTINATION_LENGTH (AFFECTED_MASK_LENGTH + AFFECTED_DPC_LENGTH)
 401
 402 #define AFFECTED_MASK_OFFSET 0
 403 #define AFFECTED_DPC_OFFSET  1
 404
 405 static void
 406 dissect_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 407 {
 408   guint16 number_of_destinations, destination_number;
 409   gint destination_offset;
 410
 411   number_of_destinations = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 412   destination_offset = PARAMETER_VALUE_OFFSET;
 413   for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
 414     proto_tree_add_item(parameter_tree, hf_affected_point_code_mask, parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH, NETWORK_BYTE_ORDER);
 415     proto_tree_add_item(parameter_tree, hf_affected_point_code_pc,   parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET,  AFFECTED_DPC_LENGTH,  NETWORK_BYTE_ORDER);
 416     destination_offset += AFFECTED_DESTINATION_LENGTH;
 417   }
 418   proto_item_append_text(parameter_item, " (%u destination%s)", number_of_destinations, plurality(number_of_destinations, "", "s"));
 419 }
 420
 421 #define ROUTING_CONTEXT_LENGTH 4
 422
 423 static void
 424 dissect_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 425 {
 426   guint16 number_of_contexts, context_number;
 427   gint context_offset;
 428
 429   number_of_contexts = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 430   context_offset = PARAMETER_VALUE_OFFSET;
 431   for(context_number=1; context_number <= number_of_contexts; context_number++) {
 432     proto_tree_add_item(parameter_tree, hf_routing_context, parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 433     context_offset += ROUTING_CONTEXT_LENGTH;
 434   };
 435   proto_item_append_text(parameter_item, " (%u context%s)", number_of_contexts, plurality(number_of_contexts, "", "s"));
 436 }
 437
 438 #define DIAGNOSTIC_INFO_OFFSET PARAMETER_VALUE_OFFSET
 439
 440 static void
 441 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 442 {
 443   guint16 diag_info_length;
 444
 445   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 446   proto_tree_add_item(parameter_tree, hf_diagnostic_information, parameter_tvb, DIAGNOSTIC_INFO_OFFSET, diag_info_length, NETWORK_BYTE_ORDER);
 447   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 448 }
 449
 450 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 451
 452 static void
 453 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 454 {
 455   guint16 heartbeat_data_length;
 456
 457   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 458   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, NETWORK_BYTE_ORDER);
 459   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 460 }
 461
 462 #define UNKNOWN_UNAVAIL_CAUSE                  0
 463 #define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE   1
 464 #define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
 465
 466 static const value_string unavailability_cause_values[] = {
 467   { UNKNOWN_UNAVAIL_CAUSE,                  "Unknown"                  },
 468   { UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE,   "Unequipped remote user"   },
 469   { INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
 470   {0,                                       NULL } };
 471
 472 #define RESERVED_0_USER_ID                0
 473 #define RESERVED_1_USER_ID                1
 474 #define RESERVED_2_USER_ID                2
 475 #define SCCP_USER_ID                      3
 476 #define TUP_USER_ID                       4
 477 #define ISUP_USER_ID                      5
 478 #define RESERVED_6_USER_ID                6
 479 #define RESERVED_7_USER_ID                7
 480 #define RESERVED_8_USER_ID                8
 481 #define BROADBAND_ISUP_USER_ID            9
 482 #define SATELLITE_ISUP_USER_ID           10
 483
 484 static const value_string user_identity_values[] = {
 485   { RESERVED_0_USER_ID,     "Reserved"       },
 486   { RESERVED_1_USER_ID,     "Reserved"       },
 487   { RESERVED_2_USER_ID,     "Reserved"       },
 488   { SCCP_USER_ID,           "SCCP"           },
 489   { TUP_USER_ID,            "TUP"            },
 490   { ISUP_USER_ID,           "ISUP"           },
 491   { RESERVED_6_USER_ID,     "Reserved"       },
 492   { RESERVED_7_USER_ID,     "Reserved"       },
 493   { RESERVED_8_USER_ID,     "Reserved"       },
 494   { BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
 495   { SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
 496   {0,                       NULL             } };
 497
 498 #define CAUSE_LENGTH 2
 499 #define USER_LENGTH  2
 500
 501 #define CAUSE_OFFSET  PARAMETER_VALUE_OFFSET
 502 #define USER_OFFSET   (CAUSE_OFFSET + CAUSE_LENGTH)
 503
 504 static void
 505 dissect_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 506 {
 507   proto_tree_add_item(parameter_tree, hf_cause, parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH, NETWORK_BYTE_ORDER);
 508   proto_tree_add_item(parameter_tree, hf_user,  parameter_tvb, USER_OFFSET,  USER_LENGTH,  NETWORK_BYTE_ORDER);
 509   proto_item_append_text(parameter_item, " (%s: %s)",
 510                          val_to_str(tvb_get_ntohs(parameter_tvb, USER_OFFSET),  user_identity_values,        "Unknown user"),
 511                          val_to_str(tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET), unavailability_cause_values, "unknown cause"));
 512 }
 513
 514 #define UNSPECIFIED_REASON          0
 515 #define USER_UNAVAILABLE_REASON     1
 516 #define MANAGEMENT_BLOCKING_REASON  2
 517
 518 static const value_string reason_values[] = {
 519   { UNSPECIFIED_REASON,         "Unspecified" },
 520   { USER_UNAVAILABLE_REASON,    "User unavailable" },
 521   { MANAGEMENT_BLOCKING_REASON, "Management blocking" },
 522   {0,                           NULL } };
 523
 524 #define REASON_LENGTH 4
 525 #define REASON_OFFSET PARAMETER_VALUE_OFFSET
 526
 527 static void
 528 dissect_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 529 {
 530   proto_tree_add_item(parameter_tree, hf_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, NETWORK_BYTE_ORDER);
 531   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REASON_OFFSET), reason_values, "unknown"));
 532 }
 533
 534 #define TRAFFIC_MODE_TYPE_LENGTH 4
 535 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 536
 537 static const value_string v5_traffic_mode_type_values[] = {
 538   { 1, "Over-ride"            },
 539   { 2, "Load-share"           },
 540   { 3, "Over-ride (standby)"  },
 541   { 4, "Load-share (standby)" },
 542   { 0, NULL                   } };
 543
 544 static void
 545 dissect_v5_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 546 {
 547   proto_tree_add_item(parameter_tree, hf_v5_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 548   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v5_traffic_mode_type_values, "unknown"));
 549 }
 550
 551 static const value_string v6_traffic_mode_type_values[] = {
 552   { 1, "Over-ride"            },
 553   { 2, "Load-share"           },
 554   { 3, "Over-ride (standby)"  },
 555   { 4, "Load-share (standby)" },
 556   { 0, NULL                   } };
 557
 558 static void
 559 dissect_v6_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 560 {
 561   proto_tree_add_item(parameter_tree, hf_v6_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 562   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v6_traffic_mode_type_values, "unknown"));
 563 }
 564
 565 static const value_string traffic_mode_type_values[] = {
 566   { 1, "Over-ride"  },
 567   { 2, "Load-share" },
 568   { 3, "Broadcast"  },
 569   { 0, NULL         } };
 570
 571 static void
 572 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 573 {
 574   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 575   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 576 }
 577
 578 #define ERROR_CODE_LENGTH 4
 579 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 580
 581 static const value_string v5_error_code_values[] = {
 582   {  1, "Invalid version"               },
 583   {  2, "Invalid network appearance"    },
 584   {  3, "Unsupported message class"     },
 585   {  4, "Unsupported message type"      },
 586   {  5, "Invalid traffic handling mode" },
 587   {  6, "Unexpected message"            },
 588   {  7, "Protocol error"                },
 589   {  8, "Invalid routing context"       },
 590   {  0,  NULL                           } };
 591
 592 static void
 593 dissect_v5_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 594 {
 595   proto_tree_add_item(parameter_tree, hf_v5_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 596   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v5_error_code_values, "unknown"));
 597 }
 598
 599 static const value_string v6_error_code_values[] = {
 600   {  1, "Invalid version"               },
 601   {  2, "Invalid network appearance"    },
 602   {  3, "Unsupported message class"     },
 603   {  4, "Unsupported message type"      },
 604   {  5, "Invalid traffic handling mode" },
 605   {  6, "Unexpected message"            },
 606   {  7, "Protocol error"                },
 607   {  8, "Invalid routing context"       },
 608   {  9, "Invalid stream identifier"     },
 609   { 10, "Invalid parameter value"       },
 610   {  0,  NULL                           } };
 611
 612
 613 static void
 614 dissect_v6_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 615 {
 616   proto_tree_add_item(parameter_tree, hf_v6_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 617   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v6_error_code_values, "unknown"));
 618 }
 619
 620 static const value_string error_code_values[] = {
 621   { 0x01, "Invalid version"                   },
 622   { 0x03, "Unsupported message class"         },
 623   { 0x04, "Unsupported message type"          },
 624   { 0x05, "Unsupported traffic handling mode" },
 625   { 0x06, "Unexpected message"                },
 626   { 0x07, "Protocol error"                    },
 627   { 0x09, "Invalid stream identifier"         },
 628   { 0x0d, "Refused - management blocking"     },
 629   { 0x0e, "ASP identifier required"           },
 630   { 0x0f, "Invalid ASP identifier"            },
 631   { 0x11, "Invalid parameter value"           },
 632   { 0x12, "Parameter field error"             },
 633   { 0x13, "Unexpected parameter"              },
 634   { 0x14, "Destination status unknown"        },
 635   { 0x15, "Invalid network appearance"        },
 636   { 0x16, "Missing parameter"                 },
 637   { 0x19, "Invalid routing context"           },
 638   { 0x1a, "No configured AS for ASP"          },
 639   { 0,    NULL                                } };
 640
 641 static void
 642 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 643 {
 644   proto_tree_add_item(parameter_tree, hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 645   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), error_code_values, "unknown"));
 646 }
 647
 648 #define AS_STATE_CHANGE_TYPE       1
 649 #define OTHER_TYPE                 2
 650
 651 static const value_string status_type_values[] = {
 652   { AS_STATE_CHANGE_TYPE,            "Application server state change" },
 653   { OTHER_TYPE,                      "Other" },
 654   { 0,                           NULL } };
 655
 656 #define RESERVED_INFO              1
 657 #define AS_INACTIVE_INFO           2
 658 #define AS_ACTIVE_INFO             3
 659 #define AS_PENDING_INFO            4
 660
 661 #define INSUFFICIENT_ASP_RES_INFO  1
 662 #define ALTERNATE_ASP_ACTIVE_INFO  2
 663 #define ASP_FAILURE_INFO           3
 664
 665 static const value_string v56_status_type_info_values[] = {
 666   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 667   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 668   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 669   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 670   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 671   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 672   {0,                           NULL } };
 673
 674
 675 #define STATUS_TYPE_LENGTH 2
 676 #define STATUS_INFO_LENGTH 2
 677
 678 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 679 #define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 680
 681 static void
 682 dissect_v56_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 683 {
 684   guint16 status_type, status_info;
 685
 686   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 687   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 688
 689   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 690   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 691                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown"), status_info);
 692
 693   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown status information"));
 694 }
 695
 696 static const value_string status_type_info_values[] = {
 697   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 698   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 699   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 700   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 701   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 702   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 703   { OTHER_TYPE           * 256 * 256 + ASP_FAILURE_INFO,          "ASP Failure" },
 704   {0,                           NULL } };
 705
 706 static void
 707 dissect_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 708 {
 709   guint16 status_type, status_info;
 710
 711   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 712   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 713
 714   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 715   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 716                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown"), status_info);
 717
 718   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown status information"));
 719 }
 720
 721 static const value_string congestion_level_values[] = {
 722   { 0, "No congestion or undefined" },
 723   { 1, "Congestion level 1"         },
 724   { 2, "Congestion level 2"         },
 725   { 3, "Congestion level 3"         },
 726   { 0, NULL                         } };
 727
 728 #define CONG_IND_RESERVED_LENGTH    3
 729 #define CONG_IND_LEVEL_LENGTH       1
 730
 731 #define CONG_IND_RESERVED_OFFSET     PARAMETER_VALUE_OFFSET
 732 #define CONG_IND_LEVEL_OFFSET        (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
 733
 734 static void
 735 dissect_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 736 {
 737   proto_tree_add_item(parameter_tree, hf_congestion_reserved, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 738   proto_tree_add_item(parameter_tree, hf_congestion_level,    parameter_tvb, CONG_IND_LEVEL_OFFSET,    CONG_IND_LEVEL_LENGTH,    NETWORK_BYTE_ORDER);
 739   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET), congestion_level_values, "unknown"));
 740 }
 741
 742 #define ASP_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 743 #define ASP_IDENTIFIER_LENGTH  4
 744
 745 static void
 746 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 747 {
 748   proto_tree_add_item(parameter_tree, hf_asp_identifier, parameter_tvb, ASP_IDENTIFIER_OFFSET, ASP_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 749   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_IDENTIFIER_OFFSET));
 750 }
 751
 752 #define PROTOCOL_DATA_1_OFFSET PARAMETER_VALUE_OFFSET
 753
 754 static void
 755 dissect_protocol_data_1_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 756 {
 757   guint16 protocol_data_length;
 758   tvbuff_t *payload_tvb;
 759
 760   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 761   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_1_OFFSET, protocol_data_length, protocol_data_length);
 762   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 763   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 764   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 765 }
 766
 767 #define LI_OCTETT_LENGTH 1
 768 #define LI_OCTETT_OFFSET PARAMETER_VALUE_OFFSET
 769 #define PROTOCOL_DATA_2_OFFSET (PARAMETER_VALUE_OFFSET + LI_OCTETT_LENGTH)
 770
 771 static void
 772 dissect_protocol_data_2_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
 773 {
 774   guint8 li;
 775   guint16 protocol_data_length;
 776   tvbuff_t *payload_tvb;
 777
 778   li                   = tvb_get_guint8(parameter_tvb, LI_OCTETT_OFFSET);
 779   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - LI_OCTETT_LENGTH;
 780   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_2_OFFSET, protocol_data_length, protocol_data_length);
 781   proto_tree_add_item(parameter_tree, hf_li, parameter_tvb, LI_OCTETT_OFFSET, LI_OCTETT_LENGTH, NETWORK_BYTE_ORDER);
 782   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 783   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + LI_OCTETT_LENGTH);
 784   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 785 }
 786
 787
 788
 789 #define CON_DEST_RESERVED_LENGTH    1
 790 #define CON_DEST_PC_LENGTH          3
 791
 792 #define CON_DEST_RESERVED_OFFSET    PARAMETER_VALUE_OFFSET
 793 #define CON_DEST_PC_OFFSET          (CON_DEST_RESERVED_OFFSET + CON_DEST_RESERVED_LENGTH)
 794
 795 static void
 796 dissect_concerned_destination_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 797 {
 798   proto_tree_add_item(parameter_tree, hf_concerned_dest_reserved, parameter_tvb, CON_DEST_RESERVED_OFFSET, CON_DEST_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 799   proto_tree_add_item(parameter_tree, hf_concerned_dest_pc,       parameter_tvb, CON_DEST_PC_OFFSET,       CON_DEST_PC_LENGTH,       NETWORK_BYTE_ORDER);
 800   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET));
 801 }
 802
 803 static void
 804 dissect_routing_key_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 805 {
 806   tvbuff_t *parameters_tvb;
 807   guint16 length, parameters_length;
 808
 809   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 810   parameters_length = length - PARAMETER_HEADER_LENGTH;
 811   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 812   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 813 }
 814
 815 static const value_string registration_result_status_values[] = {
 816   { 0, "Successfully Registered" } ,
 817   { 1, "Error - Unknown" } ,
 818   { 2, "Error - Invalid DPC" } ,
 819   { 3, "Error - Invalid Network Appearance" } ,
 820   { 4, "Error - Invalid Routing Key" } ,
 821   { 5, "Error - Permission Denied" } ,
 822   { 6, "Error - Overlapping (Non-unique) Routing Key" } ,
 823   { 7, "Error - Routing Key not Provisioned" } ,
 824   { 8, "Error - Insufficient Resources" } ,
 825   { 0, NULL } };
 826
 827 #define REG_RES_IDENTIFIER_LENGTH 4
 828 #define REG_RES_STATUS_LENGTH     4
 829 #define REG_RES_CONTEXT_LENGTH    4
 830
 831 #define REG_RES_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 832 #define REG_RES_STATUS_OFFSET     (REG_RES_IDENTIFIER_OFFSET + REG_RES_IDENTIFIER_LENGTH)
 833 #define REG_RES_CONTEXT_OFFSET    (REG_RES_STATUS_OFFSET + REG_RES_STATUS_LENGTH)
 834
 835 static void
 836 dissect_v6_registration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 837 {
 838   proto_tree_add_item(parameter_tree, hf_registration_result_identifier, parameter_tvb, REG_RES_IDENTIFIER_OFFSET, REG_RES_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 839   proto_tree_add_item(parameter_tree, hf_registration_result_status,     parameter_tvb, REG_RES_STATUS_OFFSET,     REG_RES_STATUS_LENGTH,     NETWORK_BYTE_ORDER);
 840   proto_tree_add_item(parameter_tree, hf_registration_result_context,    parameter_tvb, REG_RES_CONTEXT_OFFSET,    REG_RES_CONTEXT_LENGTH,    NETWORK_BYTE_ORDER);
 841 }
 842
 843 static void
 844 dissect_registration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 845 {
 846   tvbuff_t *parameters_tvb;
 847   guint16 length, parameters_length;
 848
 849   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 850   parameters_length = length - PARAMETER_HEADER_LENGTH;
 851   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 852   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 853 }
 854
 855 static const value_string v6_deregistration_result_status_values[] = {
 856   { 0, "Successfully De-registered" } ,
 857   { 1, "Error - Unknown" } ,
 858   { 2, "Error - Invalid Routing context" } ,
 859   { 3, "Error - Permission Denied" } ,
 860   { 4, "Error - Not registered" } ,
 861   { 0, NULL } };
 862
 863 #define DEREG_RES_CONTEXT_LENGTH 4
 864 #define DEREG_RES_STATUS_LENGTH  4
 865
 866 #define DEREG_RES_CONTEXT_OFFSET PARAMETER_VALUE_OFFSET
 867 #define DEREG_RES_STATUS_OFFSET  (DEREG_RES_CONTEXT_OFFSET + DEREG_RES_CONTEXT_LENGTH)
 868
 869 static void
 870 dissect_v6_deregistration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 871 {
 872   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_context, parameter_tvb, DEREG_RES_CONTEXT_OFFSET, DEREG_RES_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 873   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_status,  parameter_tvb, DEREG_RES_STATUS_OFFSET,  DEREG_RES_STATUS_LENGTH,  NETWORK_BYTE_ORDER);
 874 }
 875
 876 static void
 877 dissect_deregistration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 878 {
 879   tvbuff_t *parameters_tvb;
 880   guint16 length, parameters_length;
 881
 882   length            = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 883   parameters_length = length - PARAMETER_HEADER_LENGTH;
 884   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 885   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 886 }
 887
 888
 889 #define LOCAL_RK_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 890 #define LOCAL_RK_IDENTIFIER_LENGTH 4
 891
 892 static void
 893 dissect_local_routing_key_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 894 {
 895   guint32 id;
 896
 897   id = tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET);
 898   proto_tree_add_item(parameter_tree, hf_local_rk_identifier, parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET, LOCAL_RK_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 899   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET));
 900 }
 901
 902 #define DPC_MASK_LENGTH    1
 903 #define DPC_PC_LENGTH      3
 904
 905 #define DPC_MASK_OFFSET    PARAMETER_VALUE_OFFSET
 906 #define DPC_PC_OFFSET      (DPC_MASK_OFFSET + DPC_MASK_LENGTH)
 907
 908 static void
 909 dissect_destination_point_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 910 {
 911   proto_tree_add_item(parameter_tree, hf_dpc_mask, parameter_tvb, DPC_MASK_OFFSET, DPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 912   proto_tree_add_item(parameter_tree, hf_dpc_pc,   parameter_tvb, DPC_PC_OFFSET,   DPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 913   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET));
 914 }
 915
 916 #define SI_LENGTH 1
 917
 918 static void
 919 dissect_service_indicators_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 920 {
 921   guint16 length, number_of_sis, si_number;
 922   gint si_offset;
 923
 924   length        = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 925   number_of_sis = length - PARAMETER_HEADER_LENGTH;
 926
 927   si_offset = PARAMETER_VALUE_OFFSET;
 928   for(si_number=1; si_number <= number_of_sis; si_number++) {
 929     proto_tree_add_item(parameter_tree, hf_si, parameter_tvb, si_offset, SI_LENGTH, NETWORK_BYTE_ORDER);
 930     si_offset += SI_LENGTH;
 931   };
 932   proto_item_append_text(parameter_item, " (%u indicator%s)", number_of_sis, plurality(number_of_sis, "", "s"));
 933
 934 }
 935 #define SSN_LENGTH 1
 936
 937 static void
 938 dissect_subsystem_numbers_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 939 {
 940   guint16 length, number_of_ssns, ssn_number;
 941   gint ssn_offset;
 942
 943   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 944   number_of_ssns = length - PARAMETER_HEADER_LENGTH;
 945
 946   ssn_offset = PARAMETER_VALUE_OFFSET;
 947   for(ssn_number=1; ssn_number <= number_of_ssns; ssn_number++) {
 948     proto_tree_add_item(parameter_tree, hf_ssn, parameter_tvb, ssn_offset, SSN_LENGTH, NETWORK_BYTE_ORDER);
 949     ssn_offset += SSN_LENGTH;
 950   };
 951   proto_item_append_text(parameter_item, " (%u number%s)", number_of_ssns, plurality(number_of_ssns, "", "s"));
 952
 953 }
 954
 955 #define OPC_MASK_LENGTH             1
 956 #define OPC_PC_LENGTH               3
 957 #define OPC_LENGTH                  (OPC_MASK_LENGTH + OPC_PC_LENGTH)
 958 #define OPC_MASK_OFFSET             0
 959 #define OPC_PC_OFFSET               (OPC_MASK_OFFSET + OPC_MASK_LENGTH)
 960
 961 static void
 962 dissect_originating_point_code_list_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 963 {
 964   guint16 length, number_of_point_codes, point_code_number;
 965   gint point_code_offset;
 966
 967   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 968   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / 4;
 969
 970   point_code_offset = PARAMETER_VALUE_OFFSET;
 971   for(point_code_number=1; point_code_number <= number_of_point_codes; point_code_number++) {
 972     proto_tree_add_item(parameter_tree, hf_opc_list_mask, parameter_tvb, point_code_offset + OPC_MASK_OFFSET, OPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 973     proto_tree_add_item(parameter_tree, hf_opc_list_pc,   parameter_tvb, point_code_offset + OPC_PC_OFFSET,   OPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 974     point_code_offset += OPC_LENGTH;
 975   };
 976   proto_item_append_text(parameter_item, " (%u point code%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
 977 }
 978
 979 #define CIC_RANGE_MASK_LENGTH             1
 980 #define CIC_RANGE_PC_LENGTH               3
 981 #define CIC_RANGE_LOWER_LENGTH            2
 982 #define CIC_RANGE_UPPER_LENGTH            2
 983 #define CIC_RANGE_LENGTH                  (CIC_RANGE_MASK_LENGTH + CIC_RANGE_PC_LENGTH + CIC_RANGE_LOWER_LENGTH + CIC_RANGE_UPPER_LENGTH)
 984 #define CIC_RANGE_MASK_OFFSET             0
 985 #define CIC_RANGE_PC_OFFSET               (CIC_RANGE_MASK_OFFSET + CIC_RANGE_MASK_LENGTH)
 986 #define CIC_RANGE_LOWER_OFFSET            (CIC_RANGE_PC_OFFSET + CIC_RANGE_PC_LENGTH)
 987 #define CIC_RANGE_UPPER_OFFSET            (CIC_RANGE_LOWER_OFFSET + CIC_RANGE_LOWER_LENGTH)
 988
 989 static void
 990 dissect_circuit_range_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 991 {
 992   guint16 length, number_of_point_codes, point_code_number;
 993   gint point_code_offset;
 994
 995   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 996   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / CIC_RANGE_LENGTH;
 997
 998   point_code_offset = PARAMETER_VALUE_OFFSET;
 999   for(point_code_number = 1; point_code_number <= number_of_point_codes; point_code_number++) {
1000     proto_tree_add_item(parameter_tree, hf_cic_range_mask,  parameter_tvb, point_code_offset + CIC_RANGE_MASK_OFFSET,  CIC_RANGE_MASK_LENGTH,  NETWORK_BYTE_ORDER);
1001     proto_tree_add_item(parameter_tree, hf_cic_range_pc,    parameter_tvb, point_code_offset + CIC_RANGE_PC_OFFSET,    CIC_RANGE_PC_LENGTH,    NETWORK_BYTE_ORDER);
1002     proto_tree_add_item(parameter_tree, hf_cic_range_lower, parameter_tvb, point_code_offset + CIC_RANGE_LOWER_OFFSET, CIC_RANGE_LOWER_LENGTH, NETWORK_BYTE_ORDER);
1003     proto_tree_add_item(parameter_tree, hf_cic_range_upper, parameter_tvb, point_code_offset + CIC_RANGE_UPPER_OFFSET, CIC_RANGE_UPPER_LENGTH, NETWORK_BYTE_ORDER);
1004     point_code_offset += CIC_RANGE_LENGTH;
1005   };
1006   proto_item_append_text(parameter_item, " (%u range%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1007 }
1008
1009 #define DATA_OPC_LENGTH   4
1010 #define DATA_DPC_LENGTH   4
1011 #define DATA_SI_LENGTH    1
1012 #define DATA_NI_LENGTH    1
1013 #define DATA_MP_LENGTH    1
1014 #define DATA_SLS_LENGTH   1
1015 #define DATA_HDR_LENGTH   (DATA_OPC_LENGTH + DATA_DPC_LENGTH + DATA_SI_LENGTH + DATA_NI_LENGTH + DATA_MP_LENGTH + DATA_SLS_LENGTH)
1016
1017 #define DATA_OPC_OFFSET   PARAMETER_VALUE_OFFSET
1018 #define DATA_DPC_OFFSET   (DATA_OPC_OFFSET + DATA_OPC_LENGTH)
1019 #define DATA_SI_OFFSET    (DATA_DPC_OFFSET + DATA_DPC_LENGTH)
1020 #define DATA_NI_OFFSET    (DATA_SI_OFFSET  + DATA_SI_LENGTH)
1021 #define DATA_MP_OFFSET    (DATA_NI_OFFSET  + DATA_NI_LENGTH)
1022 #define DATA_SLS_OFFSET   (DATA_MP_OFFSET  + DATA_MP_LENGTH)
1023 #define DATA_ULP_OFFSET   (DATA_SLS_OFFSET + DATA_SLS_LENGTH)
1024
1025 static void
1026 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
1027 {
1028   guint16 ulp_length;
1029   tvbuff_t *payload_tvb;
1030
1031   ulp_length  = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - DATA_HDR_LENGTH;
1032
1033   if (parameter_tree) {
1034     proto_tree_add_item(parameter_tree, hf_protocol_data_opc, parameter_tvb, DATA_OPC_OFFSET, DATA_OPC_LENGTH, NETWORK_BYTE_ORDER);
1035     proto_tree_add_item(parameter_tree, hf_protocol_data_dpc, parameter_tvb, DATA_DPC_OFFSET, DATA_DPC_LENGTH, NETWORK_BYTE_ORDER);
1036     proto_tree_add_item(parameter_tree, hf_protocol_data_si,  parameter_tvb, DATA_SI_OFFSET,  DATA_SI_LENGTH,  NETWORK_BYTE_ORDER);
1037     proto_tree_add_item(parameter_tree, hf_protocol_data_ni,  parameter_tvb, DATA_NI_OFFSET,  DATA_NI_LENGTH,  NETWORK_BYTE_ORDER);
1038     proto_tree_add_item(parameter_tree, hf_protocol_data_mp,  parameter_tvb, DATA_MP_OFFSET,  DATA_MP_LENGTH,  NETWORK_BYTE_ORDER);
1039     proto_tree_add_item(parameter_tree, hf_protocol_data_sls, parameter_tvb, DATA_SLS_OFFSET, DATA_SLS_LENGTH, NETWORK_BYTE_ORDER);
1040
1041     proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", ulp_length, plurality(ulp_length, "", "s"));
1042     proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + DATA_HDR_LENGTH);
1043   }
1044
1045   payload_tvb = tvb_new_subset(parameter_tvb, DATA_ULP_OFFSET, ulp_length, ulp_length);
1046   if (!dissector_try_port(si_dissector_table, tvb_get_guint8(parameter_tvb, DATA_SI_OFFSET), payload_tvb, pinfo, tree))
1047     call_dissector(data_handle, payload_tvb, pinfo, tree);
1048 }
1049
1050 #define CORR_ID_OFFSET PARAMETER_VALUE_OFFSET
1051 #define CORR_ID_LENGTH 4
1052
1053 static void
1054 dissect_correlation_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1055 {
1056   proto_tree_add_item(parameter_tree, hf_correlation_identifier, parameter_tvb, CORR_ID_OFFSET, CORR_ID_LENGTH, NETWORK_BYTE_ORDER);
1057   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, CORR_ID_OFFSET));
1058 }
1059
1060 #define REG_STATUS_LENGTH  4
1061 #define REG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1062
1063 static const value_string registration_status_values[] = {
1064   {  0, "Successfully Registered" },
1065   {  1, "Error - Unknown" },
1066   {  2, "Error - Invalid DPC" },
1067   {  3, "Error - Invalid Network Appearance" },
1068   {  4, "Error - Invalid Routing Key" },
1069   {  5, "Error - Permission Denied" },
1070   {  6, "Error - Cannot Support Unique Routing" },
1071   {  7, "Error - Routing Key not Currently Provisioned" },
1072   {  8, "Error - Insufficient Resources" },
1073   {  9, "Error - Unsupported RK parameter Field" },
1074   { 10, "Error - Unsupported/Invalid Traffic Handling Mode" },
1075   {  0, NULL } };
1076
1077 static void
1078 dissect_registration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1079 {
1080   proto_tree_add_item(parameter_tree, hf_registration_status, parameter_tvb, REG_STATUS_OFFSET, REG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1081   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REG_STATUS_OFFSET), registration_status_values, "unknown"));
1082 }
1083
1084 #define DEREG_STATUS_LENGTH  4
1085 #define DEREG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1086
1087 static const value_string deregistration_status_values[] = {
1088   { 0, "Successfully Deregistered" },
1089   { 1, "Error - Unknown" },
1090   { 2, "Error - Invalid Routing Context" },
1091   { 3, "Error - Permission Denied" },
1092   { 4, "Error - Not Registered" },
1093   { 5, "Error - ASP Currently Active for Routing Context" },
1094   { 0, NULL } };
1095
1096 static void
1097 dissect_deregistration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1098 {
1099   proto_tree_add_item(parameter_tree, hf_deregistration_status, parameter_tvb, DEREG_STATUS_OFFSET, DEREG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1100   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, DEREG_STATUS_OFFSET), deregistration_status_values, "unknown"));
1101 }
1102
1103 static void
1104 dissect_registration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1105 {
1106   tvbuff_t *parameters_tvb;
1107   guint16 parameters_length;
1108
1109   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1110   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1111   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1112 }
1113
1114 static void
1115 dissect_deregistration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1116 {
1117   tvbuff_t *parameters_tvb;
1118   guint16 parameters_length;
1119
1120   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1121   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1122   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1123 }
1124
1125 static void
1126 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1127 {
1128   guint16 tag, parameter_value_length;
1129
1130   tag                    = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1131   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1132   proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
1133   proto_item_append_text(parameter_item, " (tag %u and %u byte%s value)", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
1134 }
1135
1136 #define V5_NETWORK_APPEARANCE_PARAMETER_TAG       1
1137 #define V5_PROTOCOL_DATA_PARAMETER_TAG            3
1138 #define V5_INFO_PARAMETER_TAG                     4
1139 #define V5_AFFECTED_DESTINATIONS_PARAMETER_TAG    5
1140 #define V5_ROUTING_CONTEXT_PARAMETER_TAG          6
1141 #define V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG   7
1142 #define V5_HEARTBEAT_DATA_PARAMETER_TAG           8
1143 #define V5_USER_CAUSE_PARAMETER_TAG               9
1144 #define V5_REASON_PARAMETER_TAG                   10
1145 #define V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG        11
1146 #define V5_ERROR_CODE_PARAMETER_TAG               12
1147 #define V5_STATUS_PARAMETER_TAG                   13
1148 #define V5_CONGESTION_INDICATION_PARAMETER_TAG    14
1149
1150 static const value_string v5_parameter_tag_values[] = {
1151   { V5_NETWORK_APPEARANCE_PARAMETER_TAG,     "Network appearance" },
1152   { V5_PROTOCOL_DATA_PARAMETER_TAG,          "Protocol data" },
1153   { V5_INFO_PARAMETER_TAG,                   "Info" },
1154   { V5_AFFECTED_DESTINATIONS_PARAMETER_TAG,  "Affected destinations" },
1155   { V5_ROUTING_CONTEXT_PARAMETER_TAG,        "Routing context" },
1156   { V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
1157   { V5_HEARTBEAT_DATA_PARAMETER_TAG,         "Heartbeat data" },
1158   { V5_USER_CAUSE_PARAMETER_TAG,             "User / Cause" },
1159   { V5_REASON_PARAMETER_TAG,                 "Reason" },
1160   { V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG,      "Traffic mode type" },
1161   { V5_ERROR_CODE_PARAMETER_TAG,             "Error code" },
1162   { V5_STATUS_PARAMETER_TAG,                 "Status" },
1163   { V5_CONGESTION_INDICATION_PARAMETER_TAG,  "Congestion indication" },
1164   { 0,                                       NULL } };
1165
1166 static void
1167 dissect_v5_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1168 {
1169   guint16 tag, length, padding_length;
1170   proto_item *parameter_item;
1171   proto_tree *parameter_tree;
1172
1173   /* extract tag and length from the parameter */
1174   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1175   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1176   padding_length = tvb_length(parameter_tvb) - length;
1177
1178   if (!tree && tag != V5_PROTOCOL_DATA_PARAMETER_TAG)
1179     return;     /* Nothing to do here */
1180
1181   /* create proto_tree stuff */
1182   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v5_parameter_tag_values, "Unknown parameter"));
1183   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1184
1185   /* add tag and length to the parameter tree */
1186   proto_tree_add_item(parameter_tree, hf_v5_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1187   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1188
1189   switch(tag) {
1190   case V5_NETWORK_APPEARANCE_PARAMETER_TAG:
1191     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1192     break;
1193   case V5_PROTOCOL_DATA_PARAMETER_TAG:
1194     dissect_v5_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_item);
1195     break;
1196   case V5_INFO_PARAMETER_TAG:
1197     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1198     break;
1199   case V5_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1200     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1201     break;
1202   case V5_ROUTING_CONTEXT_PARAMETER_TAG:
1203     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1204     break;
1205   case V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1206     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1207     break;
1208   case V5_HEARTBEAT_DATA_PARAMETER_TAG:
1209     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1210     break;
1211   case V5_USER_CAUSE_PARAMETER_TAG:
1212     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1213     break;
1214   case V5_REASON_PARAMETER_TAG:
1215     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1216     break;
1217   case V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1218     dissect_v5_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1219     break;
1220   case V5_ERROR_CODE_PARAMETER_TAG:
1221     dissect_v5_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1222     break;
1223   case V5_STATUS_PARAMETER_TAG:
1224     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1225     break;
1226   case V5_CONGESTION_INDICATION_PARAMETER_TAG:
1227     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1228     break;
1229   default:
1230     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1231     break;
1232   };
1233   if (padding_length > 0)
1234     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1235 }
1236
1237 #define V6_NETWORK_APPEARANCE_PARAMETER_TAG            1
1238 #define V6_PROTOCOL_DATA_1_PARAMETER_TAG               2
1239 #define V6_PROTOCOL_DATA_2_PARAMETER_TAG               3
1240 #define V6_INFO_PARAMETER_TAG                          4
1241 #define V6_AFFECTED_DESTINATIONS_PARAMETER_TAG         5
1242 #define V6_ROUTING_CONTEXT_PARAMETER_TAG               6
1243 #define V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        7
1244 #define V6_HEARTBEAT_DATA_PARAMETER_TAG                8
1245 #define V6_USER_CAUSE_PARAMETER_TAG                    9
1246 #define V6_REASON_PARAMETER_TAG                       10
1247 #define V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG            11
1248 #define V6_ERROR_CODE_PARAMETER_TAG                   12
1249 #define V6_STATUS_PARAMETER_TAG                       13
1250 #define V6_CONGESTION_INDICATION_PARAMETER_TAG        14
1251 #define V6_CONCERNED_DESTINATION_PARAMETER_TAG        15
1252 #define V6_ROUTING_KEY_PARAMETER_TAG                  16
1253 #define V6_REGISTRATION_RESULT_PARAMETER_TAG          17
1254 #define V6_DEREGISTRATION_RESULT_PARAMETER_TAG        18
1255 #define V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 19
1256 #define V6_DESTINATION_POINT_CODE_PARAMETER_TAG       20
1257 #define V6_SERVICE_INDICATORS_PARAMETER_TAG           21
1258 #define V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG            22
1259 #define V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  23
1260 #define V6_CIRCUIT_RANGE_PARAMETER_TAG                24
1261 #define V6_REGISTRATION_RESULTS_PARAMETER_TAG         25
1262 #define V6_DEREGISTRATION_RESULTS_PARAMETER_TAG       26
1263
1264 static const value_string v6_parameter_tag_values[] = {
1265   { V6_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1266   { V6_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1267   { V6_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1268   { V6_INFO_PARAMETER_TAG,                         "Info" },
1269   { V6_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1270   { V6_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1271   { V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1272   { V6_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1273   { V6_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1274   { V6_REASON_PARAMETER_TAG,                       "Reason" },
1275   { V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1276   { V6_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1277   { V6_STATUS_PARAMETER_TAG,                       "Status" },
1278   { V6_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1279   { V6_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1280   { V6_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1281   { V6_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1282   { V6_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1283   { V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1284   { V6_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1285   { V6_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1286   { V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1287   { V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1288   { V6_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1289   { V6_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1290   { V6_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1291   { 0,                           NULL } };
1292
1293 static void
1294 dissect_v6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1295 {
1296   guint16 tag, length, padding_length;
1297   proto_item *parameter_item;
1298   proto_tree *parameter_tree;
1299
1300   /* extract tag and length from the parameter */
1301   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1302   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1303   padding_length = tvb_length(parameter_tvb) - length;
1304
1305   if (!tree && tag != V6_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V6_PROTOCOL_DATA_2_PARAMETER_TAG)
1306     return;     /* Nothing to do here */
1307
1308   /* create proto_tree stuff */
1309   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v6_parameter_tag_values, "Unknown parameter"));
1310   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1311
1312   /* add tag and length to the parameter tree */
1313   proto_tree_add_item(parameter_tree, hf_v6_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1314   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1315
1316   switch(tag) {
1317   case V6_NETWORK_APPEARANCE_PARAMETER_TAG:
1318     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1319     break;
1320   case V6_PROTOCOL_DATA_1_PARAMETER_TAG:
1321     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1322     break;
1323   case V6_PROTOCOL_DATA_2_PARAMETER_TAG:
1324     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1325     break;
1326   case V6_INFO_PARAMETER_TAG:
1327     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1328     break;
1329   case V6_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1330     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1331     break;
1332   case V6_ROUTING_CONTEXT_PARAMETER_TAG:
1333     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1334     break;
1335   case V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1336     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1337     break;
1338   case V6_HEARTBEAT_DATA_PARAMETER_TAG:
1339     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1340     break;
1341   case V6_USER_CAUSE_PARAMETER_TAG:
1342     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1343     break;
1344   case V6_REASON_PARAMETER_TAG:
1345     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1346     break;
1347   case V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1348     dissect_v6_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1349     break;
1350   case V6_ERROR_CODE_PARAMETER_TAG:
1351     dissect_v6_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1352     break;
1353   case V6_STATUS_PARAMETER_TAG:
1354     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1355     break;
1356   case V6_CONGESTION_INDICATION_PARAMETER_TAG:
1357     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1358     break;
1359   case V6_CONCERNED_DESTINATION_PARAMETER_TAG:
1360     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1361     break;
1362   case V6_ROUTING_KEY_PARAMETER_TAG:
1363     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1364     break;
1365   case V6_REGISTRATION_RESULT_PARAMETER_TAG:
1366     dissect_v6_registration_result_parameter(parameter_tvb, parameter_tree);
1367     break;
1368   case V6_DEREGISTRATION_RESULT_PARAMETER_TAG:
1369     dissect_v6_deregistration_result_parameter(parameter_tvb, parameter_tree);
1370     break;
1371   case V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1372     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1373     break;
1374   case V6_DESTINATION_POINT_CODE_PARAMETER_TAG:
1375     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1376     break;
1377   case V6_SERVICE_INDICATORS_PARAMETER_TAG:
1378     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1379     break;
1380   case V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1381     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1382     break;
1383   case V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1384     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1385     break;
1386   case V6_CIRCUIT_RANGE_PARAMETER_TAG:
1387     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1388     break;
1389   case V6_REGISTRATION_RESULTS_PARAMETER_TAG:
1390     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1391     break;
1392   case V6_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1393     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1394     break;
1395   default:
1396     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1397     break;
1398   };
1399
1400   if (padding_length > 0)
1401     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1402 }
1403
1404 #define INFO_STRING_PARAMETER_TAG                  0x0004
1405 #define ROUTING_CONTEXT_PARAMETER_TAG              0x0006
1406 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG       0x0007
1407 #define HEARTBEAT_DATA_PARAMETER_TAG               0x0009
1408 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG            0x000b
1409 #define ERROR_CODE_PARAMETER_TAG                   0x000c
1410 #define STATUS_PARAMETER_TAG                       0x000d
1411 #define ASP_IDENTIFIER_PARAMETER_TAG               0x0011
1412 #define AFFECTED_POINT_CODE_PARAMETER_TAG          0x0012
1413 #define CORRELATION_IDENTIFIER_PARAMETER_TAG       0x0013
1414
1415 #define NETWORK_APPEARANCE_PARAMETER_TAG           0x0200
1416 #define USER_CAUSE_PARAMETER_TAG                   0x0204
1417 #define CONGESTION_INDICATIONS_PARAMETER_TAG       0x0205
1418 #define CONCERNED_DESTINATION_PARAMETER_TAG        0x0206
1419 #define ROUTING_KEY_PARAMETER_TAG                  0x0207
1420 #define REGISTRATION_RESULT_PARAMETER_TAG          0x0208
1421 #define DEREGISTRATION_RESULT_PARAMETER_TAG        0x0209
1422 #define LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 0x020a
1423 #define DESTINATION_POINT_CODE_PARAMETER_TAG       0x020b
1424 #define SERVICE_INDICATORS_PARAMETER_TAG           0x020c
1425 #define ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  0x020e
1426 #define CIRCUIT_RANGE_PARAMETER_TAG                0x020f
1427 #define PROTOCOL_DATA_PARAMETER_TAG                0x0210
1428 #define REGISTRATION_STATUS_PARAMETER_TAG          0x0212
1429 #define DEREGISTRATION_STATUS_PARAMETER_TAG        0x0213
1430
1431 static const value_string parameter_tag_values[] = {
1432   { INFO_STRING_PARAMETER_TAG,                  "Info string" } ,
1433   { ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" } ,
1434   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic Information" } ,
1435   { HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" } ,
1436   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" } ,
1437   { ERROR_CODE_PARAMETER_TAG,                   "Error code" } ,
1438   { STATUS_PARAMETER_TAG,                       "Status" } ,
1439   { ASP_IDENTIFIER_PARAMETER_TAG,               "ASP identifier" } ,
1440   { AFFECTED_POINT_CODE_PARAMETER_TAG,          "Affected point code" } ,
1441   { CORRELATION_IDENTIFIER_PARAMETER_TAG,       "Correlation identifier" } ,
1442   { NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" } ,
1443   { USER_CAUSE_PARAMETER_TAG,                   "User / cause" } ,
1444   { CONGESTION_INDICATIONS_PARAMETER_TAG,       "Congestion indications" } ,
1445   { CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" } ,
1446   { ROUTING_KEY_PARAMETER_TAG,                  "Routing key" } ,
1447   { REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" } ,
1448   { DEREGISTRATION_RESULT_PARAMETER_TAG,        "Deregistration result" } ,
1449   { LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" } ,
1450   { DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" } ,
1451   { SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" } ,
1452   { ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" } ,
1453   { CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" } ,
1454   { PROTOCOL_DATA_PARAMETER_TAG,                "Protocol data" } ,
1455   { REGISTRATION_STATUS_PARAMETER_TAG,          "Registration status" } ,
1456   { DEREGISTRATION_STATUS_PARAMETER_TAG,        "Deregistration status" } ,
1457   { 0,                           NULL } };
1458
1459 static void
1460 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1461 {
1462   guint16 tag, length, padding_length;
1463   proto_item *parameter_item;
1464   proto_tree *parameter_tree;
1465
1466   /* extract tag and length from the parameter */
1467   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1468   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1469   padding_length = tvb_length(parameter_tvb) - length;
1470
1471
1472   if (!tree && tag != PROTOCOL_DATA_PARAMETER_TAG)
1473     return;     /* Nothing to do here */
1474
1475   /* create proto_tree stuff */
1476   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, parameter_tag_values, "Unknown parameter"));
1477   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1478
1479   /* add tag and length to the parameter tree */
1480   proto_tree_add_item(parameter_tree, hf_parameter_tag,    parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1481   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1482
1483   switch(tag) {
1484   case INFO_STRING_PARAMETER_TAG:
1485     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1486     break;
1487   case ROUTING_CONTEXT_PARAMETER_TAG:
1488     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1489     break;
1490   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1491     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1492     break;
1493   case HEARTBEAT_DATA_PARAMETER_TAG:
1494     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1495     break;
1496   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1497     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1498     break;
1499   case ERROR_CODE_PARAMETER_TAG:
1500     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1501     break;
1502   case STATUS_PARAMETER_TAG:
1503     dissect_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1504     break;
1505   case ASP_IDENTIFIER_PARAMETER_TAG:
1506     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1507     break;
1508   case AFFECTED_POINT_CODE_PARAMETER_TAG:
1509     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1510     break;
1511   case NETWORK_APPEARANCE_PARAMETER_TAG:
1512     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1513     break;
1514   case USER_CAUSE_PARAMETER_TAG:
1515     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1516     break;
1517   case CONGESTION_INDICATIONS_PARAMETER_TAG:
1518     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1519     break;
1520   case CONCERNED_DESTINATION_PARAMETER_TAG:
1521     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1522     break;
1523   case ROUTING_KEY_PARAMETER_TAG:
1524     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1525     break;
1526   case REGISTRATION_RESULT_PARAMETER_TAG:
1527     dissect_registration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1528     break;
1529   case DEREGISTRATION_RESULT_PARAMETER_TAG:
1530     dissect_deregistration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1531     break;
1532   case LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1533     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1534     break;
1535   case DESTINATION_POINT_CODE_PARAMETER_TAG:
1536     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1537     break;
1538   case SERVICE_INDICATORS_PARAMETER_TAG:
1539     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1540     break;
1541   case ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1542     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1543     break;
1544   case CIRCUIT_RANGE_PARAMETER_TAG:
1545     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1546     break;
1547   case PROTOCOL_DATA_PARAMETER_TAG:
1548     dissect_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1549     break;
1550   case CORRELATION_IDENTIFIER_PARAMETER_TAG:
1551     dissect_correlation_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1552     break;
1553   case REGISTRATION_STATUS_PARAMETER_TAG:
1554     dissect_registration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1555     break;
1556   case DEREGISTRATION_STATUS_PARAMETER_TAG:
1557     dissect_deregistration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1558     break;
1559   default:
1560     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1561     break;
1562   };
1563
1564   if (padding_length > 0)
1565     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1566 }
1567
1568 static void
1569 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1570 {
1571   gint offset, length, total_length, remaining_length;
1572   tvbuff_t *parameter_tvb;
1573
1574   offset = 0;
1575   while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
1576     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
1577     total_length = ADD_PADDING(length);
1578     if (remaining_length >= length)
1579       total_length = MIN(total_length, remaining_length);
1580     /* create a tvb for the parameter including the padding bytes */
1581     parameter_tvb    = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
1582     switch(version) {
1583       case M3UA_V5:
1584         dissect_v5_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1585         break;
1586       case M3UA_V6:
1587         dissect_v6_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1588         break;
1589       case M3UA_RFC:
1590         dissect_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1591         break;
1592     }
1593     /* get rid of the handled parameter */
1594     offset += total_length;
1595   }
1596 }
1597
1598
1599 static void
1600 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1601 {
1602   tvbuff_t *common_header_tvb, *parameters_tvb;
1603
1604   common_header_tvb = tvb_new_subset(message_tvb, 0, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
1605   parameters_tvb    = tvb_new_subset(message_tvb, COMMON_HEADER_LENGTH, -1, -1);
1606   if (version == M3UA_V5)
1607         dissect_v5_common_header(common_header_tvb, pinfo, m3ua_tree);
1608   else
1609     dissect_common_header(common_header_tvb, pinfo, m3ua_tree);
1610
1611   /*  Need to dissect (certain) parameters even when !tree, so subdissectors
1612    *  (e.g., MTP3) are always called.
1613    */
1614   dissect_parameters(parameters_tvb, pinfo, tree, m3ua_tree);
1615 }
1616
1617 static void
1618 dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
1619 {
1620   proto_item *m3ua_item;
1621   proto_tree *m3ua_tree;
1622
1623   /* make entry in the Protocol column on summary display */
1624   if (check_col(pinfo->cinfo, COL_PROTOCOL))
1625     col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA");
1626
1627   /* In the interest of speed, if "tree" is NULL, don't do any work not
1628      necessary to generate protocol tree items. */
1629   if (tree) {
1630     /* create the m3ua protocol tree */
1631     m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, -1, FALSE);
1632     m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
1633   } else {
1634     m3ua_tree = NULL;
1635   };
1636
1637   /* dissect the message */
1638   dissect_message(message_tvb, pinfo, tree, m3ua_tree);
1639 }
1640
1641 /* Register the protocol with Ethereal */
1642 void
1643 proto_register_m3ua(void)
1644 {
1645
1646   /* Setup list of header fields */
1647   static hf_register_info hf[] = {
1648     { &hf_version,                          { "Version",                      "m3ua.version",                               FT_UINT8,  BASE_DEC,  VALS(protocol_version_values),                0x0, "", HFILL } },
1649     { &hf_reserved,                         { "Reserved",                     "m3ua.reserved",                              FT_UINT8,  BASE_HEX,  NULL,                                         0x0, "", HFILL } },
1650     { &hf_v5_message_class,                 { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(v5_message_class_values),                0x0, "", HFILL } },
1651     { &hf_message_class,                    { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(message_class_values),                   0x0, "", HFILL } },
1652     { &hf_message_type,                     { "Message Type",                 "m3ua.message_type",                          FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1653     { &hf_message_length,                   { "Message length",               "m3ua.message_length",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1654     { &hf_v5_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v5_parameter_tag_values),                0x0, "", HFILL } },
1655     { &hf_v6_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v6_parameter_tag_values),                0x0, "", HFILL } },
1656     { &hf_parameter_tag,                    { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(parameter_tag_values),                   0x0, "", HFILL } },
1657     { &hf_parameter_length,                 { "Parameter length",             "m3ua.parameter_length",                      FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1658     { &hf_parameter_value,                  { "Parameter value",              "m3ua.parameter_value",                       FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1659     { &hf_parameter_padding,                { "Padding",                      "m3ua.parameter_padding",                     FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1660     { &hf_parameter_trailer,                { "Trailer",                      "m3ua.paramter_trailer",                      FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1661     { &hf_network_appearance,               { "Network appearance",           "m3ua.network_appearance",                    FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1662     { &hf_info_string,                      { "Info string",                  "m3ua.info_string",                           FT_STRING, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1663     { &hf_routing_context,                  { "Routing context",              "m3ua.routing_context",                       FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1664     { &hf_diagnostic_information,           { "Diagnostic information",       "m3ua.diagnostic_information",                FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1665     { &hf_heartbeat_data,                   { "Heartbeat data",               "m3ua.heartbeat_data",                        FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1666     { &hf_v5_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v5_error_code_values),                   0x0, "", HFILL } },
1667     { &hf_v6_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v6_error_code_values),                   0x0, "", HFILL } },
1668     { &hf_error_code,                       { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(error_code_values),                      0x0, "", HFILL } },
1669     { &hf_status_type,                      { "Status type",                  "m3ua.status_type",                           FT_UINT16, BASE_DEC,  VALS(status_type_values),                     0x0, "", HFILL } },
1670     { &hf_status_info,                      { "Status info",                  "m3ua.status_info",                           FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1671     { &hf_asp_identifier,                   { "ASP identifier",               "m3ua.asp_identifier",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1672     { &hf_affected_point_code_mask,         { "Mask",                         "m3ua.affected_point_code_mask",              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1673     { &hf_affected_point_code_pc,           { "Affected point code",          "m3ua.affected_point_code_pc",                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1674     { &hf_cause,                            { "Unavailability cause",         "m3ua.unavailability_cause",                  FT_UINT16, BASE_DEC,  VALS(unavailability_cause_values),            0x0, "", HFILL } },
1675     { &hf_user,                             { "User Identity",                "m3ua.user_identity",                         FT_UINT16, BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1676     { &hf_reason,                           { "Reason",                       "m3ua.reason",                                FT_UINT32, BASE_DEC,  VALS(reason_values),                          0x0, "", HFILL } },
1677     { &hf_v5_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v5_traffic_mode_type_values),            0x0, "", HFILL } },
1678     { &hf_v6_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v6_traffic_mode_type_values),            0x0, "", HFILL } },
1679     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(traffic_mode_type_values),               0x0, "", HFILL } },
1680     { &hf_congestion_reserved,              { "Reserved",                     "m3ua.congestion_reserved",                   FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1681     { &hf_congestion_level,                 { "Congestion level",             "m3ua.congestion_level",                      FT_UINT8,  BASE_DEC,  VALS(congestion_level_values),                0x0, "", HFILL } },
1682     { &hf_concerned_dest_reserved,          { "Reserved",                     "m3ua.concerned_reserved",                    FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1683     { &hf_concerned_dest_pc,                { "Concerned DPC",                "m3ua.concerned_dpc",                         FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1684     { &hf_local_rk_identifier,              { "Local routing key identifier", "m3ua.local_rk_identifier",                   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1685     { &hf_dpc_mask,                         { "Mask",                         "m3ua.dpc_mask",                              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1686     { &hf_dpc_pc,                           { "Destination point code",       "m3ua.dpc_pc",                                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1687     { &hf_si,                               { "Service indicator",            "m3ua.si",                                    FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1688     { &hf_ssn,                              { "Subsystem number",             "m3ua.ssn",                                   FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1689     { &hf_opc_list_mask,                    { "Mask",                         "m3ua.opc_list_mask",                         FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1690     { &hf_opc_list_pc,                      { "Originating point code",       "m3ua.opc_list_pc",                           FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1691     { &hf_cic_range_mask,                   { "Mask",                         "m3ua.cic_range_mask",                        FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1692     { &hf_cic_range_pc,                     { "Originating point code",       "m3ua.cic_range_pc",                          FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1693     { &hf_cic_range_lower,                  { "Lower CIC value",              "m3ua.cic_range_lower",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1694     { &hf_cic_range_upper,                  { "Upper CIC value",              "m3ua.cic_range_upper",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1695     { &hf_li,                               { "Length indicator",             "m3ua.protocol_data_2_li",                    FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1696     { &hf_protocol_data_opc,                { "OPC",                          "m3ua.protocol_data_opc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1697     { &hf_protocol_data_dpc,                { "DPC",                          "m3ua.protocol_data_dpc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1698     { &hf_protocol_data_si,                 { "SI",                           "m3ua.protocol_data_si",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1699     { &hf_protocol_data_ni,                 { "NI",                           "m3ua.protocol_data_ni",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1700     { &hf_protocol_data_mp,                 { "MP",                           "m3ua.protocol_data_mp",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1701     { &hf_protocol_data_sls,                { "SLS",                          "m3ua.protocol_data_sls",                     FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1702     { &hf_correlation_identifier,           { "Correlation Identifier",       "m3ua.correlation_identifier",                FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1703     { &hf_registration_status,              { "Registration status",          "m3ua.registration_status",                   FT_UINT32, BASE_DEC,  VALS(registration_status_values),             0x0, "", HFILL } },
1704     { &hf_deregistration_status,            { "Deregistration status",        "m3ua.deregistration_status",                 FT_UINT32, BASE_DEC,  VALS(deregistration_status_values),           0x0, "", HFILL } },
1705     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1706     { &hf_registration_result_identifier,   { "Local RK-identifier value",    "m3ua.registration_result_identifier",        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1707     { &hf_registration_result_status,       { "Registration status",          "m3ua.registration_results_status",           FT_UINT32, BASE_DEC,  VALS(registration_result_status_values),      0x0, "", HFILL } },
1708     { &hf_registration_result_context,      { "Routing context",              "m3ua.registration_result_routing_context",   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1709     { &hf_v6_deregistration_result_status,  { "De-Registration status",       "m3ua.deregistration_results_status",         FT_UINT32, BASE_DEC,  VALS(v6_deregistration_result_status_values), 0x0, "", HFILL } },
1710     { &hf_v6_deregistration_result_context, { "Routing context",              "m3ua.deregistration_result_routing_context", FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1711   };
1712
1713   /* Setup protocol subtree array */
1714   static gint *ett[] = {
1715     &ett_m3ua,
1716     &ett_parameter,
1717   };
1718
1719   static enum_val_t options[] = {
1720     { "Internet Draft version 5",        M3UA_V5  },
1721     { "Internet Draft version 6",        M3UA_V6  },
1722     { "RFC 3332",                        M3UA_RFC },
1723     { NULL, 0 }
1724   };
1725
1726   /* Register the protocol name and description */
1727   proto_m3ua = proto_register_protocol("MTP 3 User Adaptation Layer", "M3UA",  "m3ua");
1728   m3ua_module = prefs_register_protocol(proto_m3ua, NULL);
1729   prefs_register_enum_preference(m3ua_module, "version", "M3UA Version", "Version used by Ethereal", (gint *)&version, options, FALSE);
1730
1731   /* Required function calls to register the header fields and subtrees used */
1732   proto_register_field_array(proto_m3ua, hf, array_length(hf));
1733   proto_register_subtree_array(ett, array_length(ett));
1734   si_dissector_table = register_dissector_table("m3ua.protocol_data_si", "MTP3 Service indicator", FT_UINT8, BASE_HEX);
1735
1736 };
1737
1738 void
1739 proto_reg_handoff_m3ua(void)
1740 {
1741   dissector_handle_t m3ua_handle;
1742
1743   /*
1744    * Get a handle for the MTP3 dissector.
1745    */
1746   mtp3_handle = find_dissector("mtp3");
1747   data_handle = find_dissector("data");
1748   m3ua_handle = create_dissector_handle(dissect_m3ua, proto_m3ua);
1749   dissector_add("sctp.ppi",  M3UA_PAYLOAD_PROTOCOL_ID, m3ua_handle);
1750   dissector_add("sctp.port", SCTP_PORT_M3UA, m3ua_handle);
1751 }